EFFICIENTLY DELIVERING ACOUSTIC STIMULATION ENERGY TO TISSUE
First Claim
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1. A method for driving an implanted acoustically powered receiver-stimulator having at least one tissue-engaging electrode with a tissue-electrode impedance, said method comprising:
- directing an acoustic transmission towards the implanted receiver-stimulator, said transmission having an envelope selected to compensate for the tissue-electrode impedance.
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Abstract
A system for delivering an electrical stimulation pulse to tissue comprises a controller-transmitter and a receiver-stimulator. The controller-transmitter includes circuitry having an energy storage capacitor. The capacitance of the energy storage capacitor is adjusted to improve the efficiency of energy delivered from the receiver-stimulator to tissue by modifying the geometry of an acoustic drive burst from the controller-transmitter.
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Citations
19 Claims
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1. A method for driving an implanted acoustically powered receiver-stimulator having at least one tissue-engaging electrode with a tissue-electrode impedance, said method comprising:
directing an acoustic transmission towards the implanted receiver-stimulator, said transmission having an envelope selected to compensate for the tissue-electrode impedance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for delivering an electrical stimulation pulse to tissue, said method comprising:
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directing an acoustic transmission having an envelope and is powered by circuitry including an energy storage capacitor; implanting a receiver-stimulator having circuitry including an envelope detector to produce an electrical stimulation pulse having a voltage proportional to the amplitude of the envelope of the acoustic transmission; and delivering the electrical stimulation pulse to tissue using electrodes having a tissue-electrode impedance; wherein the capacitance of the energy storage capacitor is selected to produce an acoustic transmission with an envelope of decreasing amplitude. - View Dependent Claims (11, 12, 13, 14)
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15. A system for delivering an electrical stimulation pulse to tissue, said system comprising:
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a controller-transmitter having circuitry which produces an acoustic transmission waveform having an envelope and includes an energy storage capacitor; and a receiver-stimulator having a circuitry which includes an envelope detector which receives the acoustic transmission and produces an electrical stimulation pulse having a voltage proportional to the amplitude of the acoustic transmission envelope; wherein the capacitance of the energy storage capacitor is selected to produce an acoustic transmission with an envelope of decreasing amplitude. - View Dependent Claims (16, 17, 18, 19)
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Specification